p. 39 (March 30, 1981). First instance of Marcie calling Charlie Brown "Charles." She will persist in that habit.

p. 127 (October 24, 1981). "Psychiatric help: 34 cents." In the late 1970s and early 1980s, price inflation in most western countries surged to peacetime records. In the United States, it soared to 15% per year in 1980, generating considerable anxiety in the population. Lucy's rates followed the trend and increased dramatically in 1981: they were 10 cents on March 15, 34 cents on October 24 and 50 cents on December 16. They returned to their historical level of 5 cents on June 27, 1982.